In a two-level system, the relative population (lower:upper) was found to be 0.25:0.5 The spacing between the level is 250 k Joule where kis the magnitude of Boltzmann constant. The temperature of the system is: -250 In(2) K -250/ In(2) K 250/In(2) K J 250 K

ae 6. Redefine the internal pressure of a system T, = T -p in terms of both the isothermal T. aT V. compressibility, K,, and the expansion coefficient a.

Thermodynamics

For each system listed in the first column of the table below, decide (if possible) whether the change described in the second column will increase the entropy S of the system, decrease S, or leave S unchanged. If you don't have enough information to decide, check the "not enough information" button in the last column. Note for advanced students: you may assume ideal gas and ideal solution behaviour. System Change AS AS 0 water and 250. mL of brine (very salty water). not enough information AS 0 both at 5 atm and 6° C. not enough information AS 0 not enough information OO O